Rename the action get_api as dbui_conf.

containing scripts.
Bug fixed dbui-debug.js and dbui-min.js are not store in git anymore.

Introduce a new helper function get_file_paths.
Redesign index and debug controller as well as the associated view.

- break backward compatibility through new naming /order of the model component (db, default, plugin, widget)
- Define one Node class and remove previous definition
- Add a configurator for single panel displaying url
- Modify the cfgSvc to give access to form and grid configuration remove the method get_configuration.
- Modify the appviewport to instanciate the widget from the configuration encapsulated in the leaf.

navigation tree.

- Add new modules navtree and the class NodeBase and NodeDB
- Redesign the viewport_modifier and the cfgsvc.get_tree method
- Remove the obsolete method cfgsvs.get_tables
- Sort properly list according to the locale language

The argument widget in SQLField is not usable any more.

The model is split in three parts db_database, db_languages and db_widgets.